Steam-boiler



(No Model.) 2 SheetsSheet 1.

S. T. PORTER.

STEAM BOILER. 1 No. 309,092. Patented Dec. 9, 884.

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2 SheetsSh.eet 2.

S. T. PORTER.

(No Model.)

STEAM BOILER.

UNITED dramas Parent" Christ.

SELDEN T. PORTER, OF NORWICH, CONNECTICUT.

STEAlVl BQlLER.

SPECIFICATION forming part of Letters Patent No. 309,092, dated December9, 1884.

Application filed July 5,1884. (No model.)

To all whom it may concern.-

Be it known that I, SELDEN T. PORTER, of the city of Norwich, county ofNew London, and State of Connecticut, have invented certain new anduseful Improvements in Steam-Boilers, which improvements are fully setforth and described in the following specification, reference being hadto the drawings which form a part of and accompany this specifica tion.

My invention relates to certain improvements in the so callec sectionalsteam-boil-' ers, used principally for heating purposes, my immediateobject being to simplify and strengthen somewhat certain parts of suchboilers, and also to provide a form of boiler in which the water shallbe so divided and distributed around and over the fire-pot that steammay be quickly generated, and when once generated held at a desiredtemperature with a small body of fire. It is also my purpose to bringthe fire and the water to be heated and converted into steam as closelyto get-her as possible.

Inasmuch as some of the elements of my invention are improvements onPatent No. 207,7 71, granted to Wm. H. Page, September 8,1878, I havenot described in detail the construction of such elements, but willrefer to said patent for the description of certain parts hereinafterspecified.

Briefly stated, my invention consists, first, of an improved method ofsecuring to the base-rim and crown-sheet the ends of the several stavesor sections which form the fire-pot; second, of making said sections asa true are of the circle which they are to form when joined together;third, of securing to the crown-sheet an urn-shaped section, C, hangingimmediately over the fire-pot, and provided with a series of radialwaterchambers, with aviewtodividing thewater-space; fourth, a funnelshaped compartment, D, whose lower end is secured to an upward 6X-tension on the urn C, before referred to, said funnel-shaped piece Dbeing located within the boiler proper, and forming with suitableconnecting-dues an exit or draft for the hot air; fifth, an elongatedwater-vessel, E, hung at its upper end in the funnel-shaped case D, andwhose lower end reaches below the urn C,

a my object in thus extending said water-vessel below said urn being tobring a portion of the water as near as possible to the hottest part ofthe firethat is, to the center of said fire.

In the accompanying drawings, Figure 1 is a front elevation of mysteam-l1eater as it appears when cased up ready for use. Fig. 2 is avertical section on line 00 a; of Fig. 1, the grate being removed. Fig.8isatop detached view, somewhat enlarged, of the central watervessel, E.Fig. ads a top sectional view of the boiler proper, taken on line 2 2,Fig. 2, sh owing the flues a a, which lead outward from the funnel D.Said Fig. 4 also shows a top view of said funnel and of the centralwater-vessel, E. Fig. 5 is a detached top view of my base-rim B. Fig. 6is atop view of one of the hollow sections 1;, which form the barrel orfire-pot of my heater. Fig. 7 is a detached view, top and side, of theurn C. Fig. 8 shows top and side views of the funnel D.

The barrel or fire-pot of my heater is formed of a series of hollowstaves or sections, b, preferably six in number, the lower ends of saidsections resting on ledges e c and cross-ties d in the grooved base-rimB. This method of supporting and securing the sections b in the base-rimis one of my improvements on the method adopted in the patent to Pageabove referred to. The fire-pot in said patent to Page is formed of aseries of sections whose exterior, when joined together, presents ascalloped or foliated outline, the lower end of said sections being heldin the rabbeted baserim on a line or level with said base-rim.

I find in practice as the several sections are being securely cementedin place there is a constant liability (as the cement is tamped home) tocrowd the slight rim or rib 011 the outer side of the sections outward,and thus to crack the base-rim, and to overcome this scrious'objectionIhave constructed my baserim with a circular groove havingstrengthening-ledges and cross-ties located a considerable distancebelow the plane of the baserim proper. By thus supporting thesections 1) below the-plane of the base-rim I obtain the full strengthof the broad flange or plate 6 when tamping in the cement, instead ofdepending on a slight rib, as in the Page patent. and the ledges andcross-ties also provide a solid foundation or support for the sections bto rest on. In practice I swell the ends of the sections 22 so that whencemented in place they are practically dovetailed into the base-rim andcrown-sheet.

On the upper end of the barrel formed by the series of sections b islocated a crpwnsheet, F, formed with a series of radiating hollow arms,in principle substantially like that shown and described by said Page.The top central opening of the crown-sheet F is provided with aninternal screw-thread to receive and support the threaded neck on theunder side of the boiler proper, which is shown at H, and is alsosubstantially as in the patent to Page. The lower central opening in thecrown-sheet F is threaded to receive the urn-shaped casting O. \Vithinthe outer shell of said casting O isa second cylindrical shell or neck,6, (see Fig. 7,) extending somewhat above the outer shell, and threadedto receive the funnel-shaped piece D, whose top central hole is in turnthreaded to receive the hanging water-vessel E; The casting O has itslower portion formed with a series of radiating hollow arms, h, whichare suspended below the crown-sheet and immediately above the firepot,presenting a large amount of heating-surface to the lire, yet allowingthe fire to pass freely upward to and between the arms of thecrown-sheet.

It is awell-known fact that a given amount of heating-surfaceimmediately over or within the fire-pot (as in the ease of the arms h)is more economically heated than the same amount of heating-surfacearound or outside of said fire-pot. The watcr-vessel E is provided atits upper end with one or more apertures, k, which open into the boilerH.

It will be evident that the section 0 could be formed witlra closed top,and the pieces D E dispensed with; or, if so desired, the watervesselEcould be added by so forming its upper end that it could be screwed ontotheneek t in place of the funnel D. It will also be seen that thesections D 0 could be dispensed with and the water-vessel E screwedintothe lower opening in the crown-sheet in place of the piece 0, as nowshown in the drawings. Such combinationswouldnecessitateeertainchangesin the size of the parts mentioned, but would not alter their generalshape nor impair their utility.

The space between the water-vessel E and the inner walls of thefunnel-shaped case D is connected with and exposed to the fire by thecentral openingin the piece 0, and to cause a continuous circulation ofhot air in said space I provide one or more pipes or flues,a a,whieh,asbefore stated, lead outward through the shell of the boiler-H. By thuscuttingup the water-space in my heater I am able to present the water tothe fire in thin sheets or small bodies, which feel the effect of thefire much quicker than would a large tank of water.

Having thus described my invention, I claim as new and wish to secure byLetters Patent- 1. In combination with a fire-pot composed of a seriesof vertical staves or sections,a crownsheet supported on and securedfixedly to said fire-pot, a boiler, H, secured detachably to the uppershell of said crown-sheet, and anurnshaped section, 0, secureddetachably to the lower shell of the crownsheet, said section 0 beingprovided with a series of radial waterchambers, h, located below thecrown-sheet and within the fire-space, substantially as and for thepurpose specified.

2. In combination with a cylindrical sectional fire-pot, a crown-sheet,F, supported on said fire-pot, a boiler, H, secured to the upper shellof the crown-sheet, an urn-shaped section (having the radialwater-chambers h) at-:, tach'ed to the lower shell of the crown-sheet,and the funnel-shaped section D,secured to the inner neck, 2', ofsection 0, tubes or flues a a, leading outward through the boiler. H,being provided to form a draft-connection between said section D and thedraft proper, as and for the purpose specified.

3. In combination with a cylindrical sectional fire-pot. a crown-sheet,F, supported on said firepot, the boiler H, secured to the upper shellof the crown-sheet, the urn-shaped section 0, (having radialwater-chambers 71,) secured to the lower shell of the crown-sheet, thefunnel-shaped section D,secured to theinner neck of section 0, and thewater-vessel E, said water-vessel being secured in the upper plate ofsection D, and provided with apertures 7c opening into the boilerproper, substantially as and for the purpose specified.

, 4. A fire-pot composed of a series of hollow vertical sections, incombination with a baserim grooved to receive said sections, andprovided at .a considerable distance below the level of the flange cwith strengthening-ledges c c and cross-ties d, on which the sectionalfirepot rests when in place, as and for the purpose specified.

SELDEN T. PORTER. \Vitnesses:

FRANK H. ALLEN, AMos A. BROWNING.

